Construction



April 17,1926. 1,666,570

J. KERSTEN T SOUND AMPLIFYING CONSTRUCTION Filed Dec. 14, 1925 2 Sheets-Sheet l IHIH V 20 lnuanfor Kernel A n'l 17, 1928. 1,666,570

J. KERSTEN SOUND AMPLIFYING CONSTRUCTION Filed Dec. 14, 1925 2 Sheets-Sheet 2 Patented Apr. 17, 1928.

OFFICE.

JACOB KERSTEN, OF ALLEGAN, MICHIGAN,

Y SOUND-AMPLIFYING CONSTRUCTION.

" Application filed December .This inventionrelates to a sound amplifying construction particularly adapted for use withiradio loudspeaker units. It is a. primary-object and. urposetof the present invention, toprov ide a gsound amplifier :which; is simple..in constnuetion and economical ,to 'p'ro( 1uo'e, and whioh; presents a ;very pleasing and. ;,ms tractive a pearance when the partsthereof aliems sg ib ed. 1 1 -iToj these rends'f ajs well as others not at this timespecifically. enumerated' l have produced the construction described gin-the followi g-des ip on ia d I hQ L- n' t a co p nyingndrawiyg iiin milli hwa-t-i 4 Pi lz l h th so n mp i ec 1.651 6 e s y t u .io .tl1e'{ int .thereofhe ug -a s ed lationlgiw f"' :i Fl 11%. '1' i 5! perspective view j of, the parts fifti he ou e fEshel-l di sassembled, and I =p ify1 g- -h .1.=;-1oc te ii h e sh lls i I ini ike ireference veha ter sein" to a like parts in'th idiiferent. figures; -ofthe draw- :In the amplifier,

an outer shell or enclosureiis. made, the; same com rising. twoflebnical ha1ves- .:-:Qne0f hese, indicatedzat 1, is iformed with a 1 p2 around its ledge ,meduced in; thickness, and at the 1 low-mi sidefzis' i-gprovided =-,w ith;--one ,half of ameck portio n-,3.-whieh;;projects downwardrrly-fl tfomr'themaiitsbody ofisaid half of -the shell.;!-,The opposite halfyofithe shell 4 is of =-similamconstruction;and ,it also is provided Y -.'withian.annular-lipf5 atiitslfree edges reduced in thickness, and with the-other half 6 of the neck projecting 'from the lower are-placed togetherwith the lips 2 and in abutting engagement they-may beheld securely together by. aeclampingl ring v 8 of thin imetal which -is in "theifiform', substantialbg of-acircular tubehaving an arc'there- -'of =rmovedgf'at its lowerside providing a "slot'around the "tubeatits inner sides so 14,: 1925; 1 Serial No. ;r5,19i..

as to receive 7 the lipsf 2and 5 and be clinched tightly against the same. Y The amplifying hot-Ii structure which is located within the outi". shell also formed, in: a suitable mold', from paper and comprises =twospaced apart sides?) I a t i i l e tg-edges; ilr cdi feet by t cross ,members; '11,. said ni c'mbeis Pcurving downwardly and inwardly, toward each other and joining with the lower poiti on srof the sides .and 10 t q nake ti downwardly eete i l t se k @1 i s m. .I hmpw ,pettidn s of t-h e' si des 9. id 'lO'are'il fif ed I- \1 if" zqtl e i lS 1 W d ea h i efl d' b We 's ppra n' l g$. s I h or, bulged; outwardlyf, as: indicated at' 1113, thence approaching more c'losely'toeach other and then againffia ringoutwardly asfin- (heated at .14, .the'nlargements and. fiarings of sidesbeing siihstantially'at the middle portifon s :oi" kini'dway between, the side edges. Qof said: parts Sifand 10 as shown. A tube 15 of metal,- ta'pe'ring' somewhat toward its lower endtis passed .downwai'dly,,into nee and eitends a distance below the emQl;.-1=T h stub i th t' lll w .end it qeceive theinteiioily threadedl'col- In the em 1y of the construction theamplifying ho nshovvnjn F i .3 with the collar, 16 removied-{ 1s placediconical members 1 and4 of the outer shell before thesalnearesecured togetherv b'y the clamping ring fi; thelowet :end of thesleeve 15 extending ashortdistance belowfthe lower end ofthe neckinade by the two portions 3 and 6 so that when the collar 16';is threaded onto the lower end of the'sleeve the interior amplifying. horn is rigidly secured o'sition the lower edges of the: t 12 bearing against the inner sides of the mem- .fbers l. andigasfshown inzFig.-- 1. V This constructionis{adaptedtobe mounted ina suitable jbaself which is formed with an upwardly entending neck 18 having a tapering recess intoxwhich theneck oft-he outer shell made byt-he ,parts and 6-, i s rece'ived. The loud speaker, unit 19 is located-in a re- ;cess inia lower side of the .base17, and the .wires 20ass0ciated withthe unit:pass.out-

- wa-rdly .throughctsuitableopening in the base'as isshownin liig l. V This construction -of sound-amplifying device is'verysimple and economical to make,

'is'veryquiokly and readily assembled ,and

and 10 which, i

etvveen :th. two L mma"nweear -"go eefi ig 561 the sound given o'fi by the l'du'd sfiiiker unit at 19 is s'ulfieie'ntly and properly amplifie'd by the horn member shown in Fig. 3, the sound Waves passing outwardly through the o openings at 7. The construction is light, is

\o the "arrangin 'Shen, *fha'y "he agreed "iii n- 30 in horn loiitfed wit'liin 'tliefsliell ined-e by so of theish'e ll a nd zii'if'rijjprho ha ing-spaced 4111 ,dt icef'riftheflchai eeter described, cs 1h :iin'plifyingellernfnt inchiding a'sle ve to eross l'n'r'nbers' ehnnect-ing t-lie 'loWer edges connected thereto.

methane in thecia sjaeenbieum hdlof the sides, said cross 'ni'e'lnherls fei'irving downwfirdly and 'imva'ltlly and joining with the sides at their lower portions to form a neck portioninwhieh the upper end of said sleeve is received, substantially deseribed.

5. A device of the class described comprising a hollow shell formed at its lower side with a tllownwz'irdly projecting neck por tion one side of said shell lnn'ing openings therein, a metal sleeve "extending throl'lgh said eck ed-non 'oft-he S llCll ftfitltlllljlfd to :reeeiye a loiid speaker unit at its lower end finda stiiliid in'n 'a'lifying element eor'ir'ieeted to the iipp er end ofthe sleeve within the shell and ch pr'isii'j'g'spileed 'ii 'ih'rt sides "and eross"inefnbers'jeonneeting the. sides at 'the'i'r 'lo'h er edges "'a'nd ear-vine; th-wn'waflai and inwardly find integrally 'joi'n'in'g 'wv'ith 1tihe sides 'hfit'li'e'i'r loiver portions to for'hi ii lower 'Ijig'ik i'nwhic'h the upper ei'id of said sleeve is received. 1 I

"6. A 'deviee afftlre use tlescijibe'tl edrfiprising a hollow shell having downwardly extending taperd'ineck p'ortion fit its'lod ver end, one side of sai'a she'llyb-ein pro'vieletl with openings therethrough, 'a "supporting base formed with 11v ertical tapered opelnlhjq "t-h'erethrough in 'whieh neck portion I of the shell is seated, "a tapered "sleeve-passing throtr'gh said neck {portion ofthe shell hnd throilg'h the i opening in said liaise, afiid 'sotmd qfihdi'fy'in element eomi'e'cted with the'h peiendof'th'e sleeve en'd'loceted within said shell, the lower end of said sleeve 'biiig adapted to haven loud sp'eakr 'iinit liig {at one sidea shpporting rbnse formed with a'ver'ticel'tzipered opening therethrough, q tapered sleev iass' 'd through sejd openifig int-he shelljsind'throngh 'the'o enirig=i11 the liasefthefloiver e'n'd'of said sleeve being adapted to =ree'eive a" loud speaker unit; "an r1 2 sound arn-r ili'fying element e'onnecte'd with the up p'erend of the sleeve "ahd l'oe'atcl Within 'silldshll.

8. A devieeof the elztssd'eseribetl. eoln- I 1 a V prising fahollow Shell havlng an opening at one side, {a su 'ip'orting *hzise 'forlned wlth'a vertical tapere etl'jope-ning therethrough, a,

"tapered -"slee'vef-passed 'tlirohgh 'sziji'd 'o'peni-ng in the "shelliind through theop'ening 'in'the base, ineansrat th'e-lower end o'f thehleeve unit 'willengzige the finder-"side of the "base 'to retain the sleeve in the shell-ahd-base, and

a "sound amplifying ele'fnnt connected with the'up'ner endof th'e'sleeveandloeated Within said shell. v Y

'9. An amplifyinghorn comprising a-hons- 'ing 'of two -conical members located ,with their bases in'eontaem eaeh member atjits edge being formed 'with'en :ofitwardly extending lip, sou'ndamplifying means located within said conical members, and a hollow annular metallic ring slotted at its inner side located over said projecting-lips and clamped there against to hold the housing members together.

10. An amplifying horn comprising a housing of two conical members located with their bases in contact, each member at its edge being formed with an outwardly ex- 10 tending lip. one of said members being perforated to emit sound, a sound amplifying horn located between said conical members and having its neck projecting therefrom and a hollow annular ring of metal slotted at its inner side located over said projecting lips and clamped there against to hold the housing members together.

In testimony whereof I aflix my signature.

JACOB KERSTEN. 

